Built from the same basis of design principles as the Mark One but fabricated from bar stock, the Mark Two is an extremely versatile control valve. Due to its constructions, it is available in many different configurations with shorter lead times than conventionally cast valve bodies, even in high-pressure classes or special alloys.
Additional information
| Valve Size | 1/2" to 6" |
|---|---|
| Pressure Class Standard | ASME B16.34 |
| Face-to-Face Standard | ANSI ISA S75.20, S75.03, S75.16, S75.12, S75.15 & Custom |
| Bonnet | Standard, Extended, Cold Box Extended, Cryogenic, Bellows Seal |
| Packing | Standard, Twin Seal, Vacuum Seal, Environment Fugitive Emissions, Live-Loaded |
| Guiding | Double Top Stem Internal to Bonnet |
| Trim | Plug & Clamped Seat, Special Cage & Stack Designs |
| Trim Characteristics | Equal Percentage, Linear, Quick-Open |
| Seating | Metal-to-Metal & Soft |
| Shut-Off Classification | ANSI FCI 70-2 Class IV, V, VI |
Features & Benefits
- Double Top Stem Guiding moves the critical function of assuring alignment of the trim out of the flow path
- Single Piece Plug & Stem assures integrity of the assembly, avoiding side load fracturing
- Oversized Stem provides greater durability for high-pressure applications
- Plug Contours provide flow characteristics with higher rangeability than cage designs
- Floating Seat is clamped in-place after alignment to ensure tight-shutoff and easy service
- Seat Retainer (Cage) is not a throttling component, allowing for more cost effective material selection
- Bolted Bonnet eliminates service issues related to threaded designs
- Severe Service Trim options can easily be designed or retro-fitted into standard trim valve
- Parts interchangeability with Mark One Series valves
Standards & Certifications
| Certifications | Canadian Registration Number (CRN) |
|---|---|
| Safety Integrity Level (SIL) 3 Capable | |
| PED Directive 97/23/EC | |
| Design Standards | ASME B16.5 – Pipe Flanges & Flanged Fittings |
| ASME B16.9 – Factory-Made Wrought Buttwelding Fittings | |
| ASME B16.10 – Face to Face & End Dimenions of Valves | |
| ASME B16.11 – Forged Fittings, Socket-Welding & Threaded | |
| ASME B16.25 – Buttwelding Ends | |
| ASME B16.34 – Valve Flanged, Threaded, and Welding End | |
| ASME SA Materials | |
| ASTM A Materials | |
| Quality | IS0 9001:2008 |
| ATEX QAN | |
| IECEX QAR |
